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Storage Pools 0 and 255

Every DC/UCF system must include storage pool 0. It should be large enough to contain the amount of variable non-XA storage required by both CA-supplied and user-written programs (for example, CA ADS dialogs, system tasks, and CA OLQ).

Storage pool 0 also serves as an "overflow" pool for those storage types for which no non-XA secondary storage pool exists. Overflow occurs when there is no secondary storage pool that has enough space available for a storage request.

Every DC/UCF system must include storage pool 255. It should be large enough to contain the amount of variable XA storage needed by the DC/UCF system for internal house-keeping storage (for example, communication buffers, report printing and scratch management). When starting a DC/UCF system, the generated pool 255 is dynamically extended with a secondary pool 255 that contains internal house-keeping storage needed during startup.

Displaying the Actual Size of Storage Pools

You can use the DCMT DISPLAY STORAGE command to determine the actual size of the pools.

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